Add permissions to commands that do not have them

**Versions**

WorldEdit version: Bukkit-Official(7.2.2+fc3c499)
Platform version: Paper version git-Paper-520 (MC: 1.16.5)

**Describe the bug**

Some WE commands either misses permissions or ignores them when doing tab completion and/or executing them wrongfully

**To Reproduce**

1. Create a fresh install of Paper
2. Install WE and LuckPerms
3. Set up permissions to deny all WE commands
4. Try `//br` in various forms, both correct and incorrect

**Expected behavior**

It is expected that when you have denied all WE permissions, the commands should not show up in the tab completion list also the command help should not be returned when the user is not permitted to use the command